Electrodeless lamp system

Abstract

Disclosed is an electrodeless lamp system, including a microwave generator generating microwaves, a microwave resonator including a cavity coupled with the microwave generator and an LC resonance circuit constituted with an inductor and a capacitor so as to make the microwaves trapped inside the cavity to resonate with the LC resonance circuit, and a light-emitting unit coupled with the cavity to form plasma by the resonating microwaves so as to emit light.

What is claimed is:  
     
       1. An electrodeless lamp system comprising: 
       a microwave generator generating microwaves;  
       a microwave resonator including a cavity coupled with the microwave generator and an LC resonance circuit constituted with an inductor and a capacitor, the LC resonance circuit being installed in the cavity so as to make the microwaves trapped inside the cavity resonate with the LC resonance circuit; and  
       a light-emitting unit coupled with the cavity to form plasma by the resonating microwaves so as to emit light.  
     
     
       2. The electrodeless lamp system of  claim 1 , wherein the microwave resonator further comprises a microwave feeder unit connected to an outlet of the microwave generator so as to guide the microwaves inside the cavity. 
     
     
       3. The electrodeless lamp system of  claim 2 , wherein the microwave feeder unit is connected to the outlet of the microwave generator, penetrates the cavity, and extends toward an inner side of the cavity so as to guide the microwaves generated from the microwave generator inside the cavity. 
     
     
       4. The electrodeless lamp system of  claim 2 , wherein a shape of an end portion of the microwave feeder unit is selected from a group consisting of a sphere, a pyramid, a cone, and a hexahedron. 
     
     
       5. The electrodeless lamp system of  claim 2 , wherein a shape of an end portion of the microwave feeder unit is tapered. 
     
     
       6. The electrodeless lamp system of  claim 2 , wherein the microwave feeder unit is a rod of which cross-section is selected from a group consisting of a polygon and a circle. 
     
     
       7. The electrodeless lamp system of  claim 2 , wherein an electric field intensifying member is installed inside the microwave feeder unit additionally so as to intensify an electric field of a lamp bulb of the light-emitting unit. 
     
     
       8. An electrodeless lamp system comprising: 
       a microwave generator generating microwaves;  
       a microwave resonator including a cavity coupled with the microwave generator and an LC resonance circuit constituted with an inductor and a capacitor so as to make the microwaves trapped inside the cavity resonate with the LC resonance circuit; and  
       a light-emitting unit coupled with the cavity to form plasma by the resonating microwaves so as to emit light;  
       a lamp bulb filled with a light emitting material emitting light by forming plasma by microwaves;  
       a filter member formed in a substantially oval shape around the lamp bulb and coupled with an opening formed at the cavity so as to transmit the microwaves inside the cavity but reflect the light emitted from the lamp bulb toward an outside of the cavity; and  
       a cut-off member coupled with the filter member so as to form a space for installing the lamp bulb, transmit the light, and prevent the microwaves from leaking.  
     
     
       9. The electrodeless lamp system of  claim 8 , wherein an electric field intensifying member is additionally installed outside the lamp bulb so as to intensify an electric field. 
     
     
       10. The electrodeless lamp system of  claim 1 , wherein the inductor is formed by a first conductive extending from an inner surface of the cavity toward an inner side of the cavity and the capacitor is formed between a second conductive member coupled with end portions of the second conductive member, the first conductive member, and the inner surface of the cavity so as to form the LC resonance circuit. 
     
     
       11. The electrodeless lamp system of  claim 10 , wherein a third conductive member shorter than the first conductive member extends from the inner surface of the cavity so as to form an additional inductor. 
     
     
       12. The electrodeless lamp system of  claim 11 , wherein a fourth conductive member is additionally coupled with an end portion of the third conductive member whereby an additional capacitor is formed between the fourth conductive member and the inner surface of the cavity. 
     
     
       13. The electrodeless lamp system of  claim 10 , wherein the first conductive member inclines to the inner surface of the cavity. 
     
     
       14. The electrodeless lamp system of  claim 10 , wherein the first conductive member has a curved shape in a length direction. 
     
     
       15. The electrodeless lamp system of  claim 10 , wherein the first conductive member has a step-like shape in a length direction. 
     
     
       16. The electrodeless lamp system of  claim 10 , wherein the first conductive member has a coil shape in a length direction. 
     
     
       17. The electrodeless lamp system of  claim 10 , wherein the first conductive member is a dielectric rod coated with a conductive material. 
     
     
       18. The electrodeless lamp system of  claim 10 , wherein the microwave resonator further comprises a microwave feeder unit coupled with an outlet of the microwave generator so as to guide the microwaves inside the cavity. 
     
     
       19. The electrodeless lamp system of  claim 18 , wherein a plurality of the first conductive members is arranged radially centering around the microwave feeder unit. 
     
     
       20. The electrodeless lamp system of  claim 10 , wherein a plurality of protrusions is formed on a surface of the second conductive member. 
     
     
       21. The electrodeless lamp system of  claim 10 , wherein the second conductive member is made of a dielectric material coated with a conductive material. 
     
     
       22. The electrodeless lamp system of  claim 10 , wherein the second conductive member has a ring shape. 
     
     
       23. The electrodeless lamp system of  claim 10 , wherein the second conductive member has a plurality of separate ring shapes. 
     
     
       24. The electrodeless lamp system of  claim 1 , the cavity comprising: 
       a coupling unit coupled with the microwave generator;  
       an opening coupled with the light-emitting unit so as to confront the coupling unit; and  
       a sidewall portion connecting the coupling unit to the opening.  
     
     
       25. The electrodeless lamp system of  claim 24 , wherein the cavity has a cylindrical shape. 
     
     
       26. The electrodeless lamp system of  claim 24 , wherein the sidewall portion is tapered. 
     
     
       27. The electrodeless lamp system of  claim 1 , wherein a sidewall portion is convex toward an outside of the cavity. 
     
     
       28. The electrodeless lamp system of  claim 1 , wherein an EMI filter is installed inside the cavity so as to prevent the LC resonance circuit from external influence.